我试图通过销毁当前 Activity 来释放堆大小，同时转到另一个 Activity 。
我在 backPreess() 上使用 finish();
但这并没有释放堆。
on setContentView()
堆大小增加了 16Mb。我想在进行另一项 Activity 后释放堆中的这种增加。任何人都可以帮助如何做到这一点？
我的代码如下:
package com.stancil.levels;
public class PaintActivity extends ZebraActivity implements
PaintView.LifecycleListener, PaintView1.LifecycleListener1 {
private static final int REQUEST_PICK_COLOR = 1;
....
....
public PaintActivity() {
_state = new State();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Constants.context = getApplicationContext();
setContentView(R.layout.paint);
..................
...................
...............
}
public void onPreparedToLoad() {
// We need to invoke InitPaintView in a callback otherwise
// the visibility changes do not seem to be effective.
new Handler() {
@Override
public void handleMessage(Message m) {
new InitPaintView();
Log.v("PaintActivity", "After InitPaintView Called");
}
}.sendEmptyMessage(0);
}
private class InitPaintView implements Runnable {
private Bitmap _originalOutlineBitmap;
private Handler _handler;
public InitPaintView() {
// Make the progress bar visible and hide the view
_paintView.setVisibility(View.GONE);
_progressBar.setProgress(0);
_progressBar.setVisibility(View.VISIBLE);
_state._savedImageUri = null;
_state._loadInProgress = true;
_originalOutlineBitmap=_imageBitmap;
_handler = new Handler() {
@Override
public void handleMessage(Message m) {
switch (m.what) {
case Progress.MESSAGE_INCREMENT_PROGRESS:
// Update progress bar.
_progressBar.incrementProgressBy(m.arg1);
break;
case Progress.MESSAGE_DONE_OK:
case Progress.MESSAGE_DONE_ERROR:
// We are done, hide the progress bar
// the paint view back on.
_state._loadInProgress = false;
_paintView.setVisibility(View.VISIBLE);
_progressBar.setVisibility(View.GONE);
initiatePopupWindow();
break;
}
}
};
new Thread(this).start();
}
public void run() {
Log.v("Wasimmmmmmmmmmmmmmmm", "qqqqq 22");
_paintView.loadFromBitmap(_originalOutlineBitmap, _handler);
}
}
private static class State {
// Are we just loading a new outline?
public boolean _loadInProgress;
// The resource ID of the outline we are coloring.
//public int _loadedResourceId;
//
// If we have already saved a copy of the image, we store the URI here
// so that we can delete the previous version when saved again.
public Uri _savedImageUri;
}
@Override
public void onBackPressed() {
new AlertDialog.Builder(this)
.setTitle("Exit")
.setMessage("Do you want to go to Main Menu?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Constants.check_new=true;
Intent i=new Intent(PaintActivity.this,MainActivity.class);
// i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
finish();
overridePendingTransition(R.anim.fade_in, R.anim.fade_out);
}
}).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// Do nothing.
}
}).show();
}
}
}
最佳答案
在 onDestroy 方法中释放 yoru 对象，无论如何，如果没有对被销毁 Activity 的引用，GC 将在需要时自动清理(它不需要在您关闭 Activity 后立即发生)。 或者，有一种方法可以强制运行 GC，但我什至不会写它，因为它不是典型应用程序应该使用的真正特性
关于android - Activity 不会破坏以在 android 中释放堆？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20285340/